Disinfection of E. coli by nonthermal microplasma electrolysis in normal saline solution

Yukinori Sakiyama, Takaaki Tomai, Masaru Miyano, David B. Graves

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

We present a unique method to inactivate microorganisms in 0.9% NaCl solution (normal saline solution) by means of microplasmas. The device consists of a thin titanium wire covered by a glass tube for insulation except the tip and a ground electrode. Application of an asymmetric high-frequency, high voltage results in the formation of microbubbles at both electrodes. Repetitive light emission is observed in the vicinity of the powered electrode. We employed E. coli bacteria to investigate the disinfection efficiency of the device. More than 99.5% of E. coli were deactivated in 180 s. The survival curve showed biphasic behavior.

Original languageEnglish
Article number161501
JournalApplied Physics Letters
Volume94
Issue number16
DOIs
Publication statusPublished - 2009 May 6
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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